• Optical birefringence and order parameter of three nematogens

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      https://www.ias.ac.in/article/fulltext/pram/029/04/0409-0417

    • Keywords

       

      Nematogens; optical birefringence; order parameters; density

    • Abstract

       

      Results of the measurement of refractive indices and densities of three nematic liquid crystals at different temperatures are reported. The molecular polarizabilities have been calculated from refractive indices using both the Vuks’ and the Neugebauer’s relations. The orientational order parameters are determined from the polarizability values. The variation of order parameter with temperature for these compounds shows a reasonably good agreement with Maier and Saupe theory except near the clearing points where the experimental values are less than those obtained from the theory. The possible reasons for this have been discussed.

    • Author Affiliations

       

      M Mitra1 S Paul1 R Paul1

      1. Department of Physics, North Bengal University, Siliguri - 734 430, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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